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The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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Updated: Sep 1, 2025

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Hydrophilic Polymer-Guided Polycatecholamine Assembly and Surface Deposition.

Yan Mei1, Kai Yu1, Hossein Yazdani-Ahmadabadi2

  • 1Centre for Blood Research and Department of Pathology & Laboratory Medicine, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada.

ACS Applied Materials & Interfaces
|August 17, 2022
PubMed
Summary

Mussel-inspired surface coatings utilize polycatecholamines and polymers. Polymer chemistry dictates how these components self-assemble and deposit, influencing the effectiveness of resulting antifouling and antibiofilm surfaces.

Keywords:
antiadhesive coatingantibiofilm coatingnoncovalent interactionspolycatecholpolydopamineself-assembly

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Area of Science:

  • Surface chemistry
  • Materials science
  • Biomaterials engineering

Background:

  • Mussel-inspired surface chemistry using polycatecholamines and polyphenols is a versatile method for surface modification.
  • Catecholamine-assisted codeposition is a one-step strategy for imparting surface functionalities.
  • The underlying mechanisms of coassembly and codeposition remain poorly understood.

Purpose of the Study:

  • To investigate the coassembly and codeposition mechanisms of polycatecholamines with various hydrophilic polymers.
  • To understand how polymer chemistry and architecture influence the self-assembly and surface deposition processes.
  • To evaluate the impact of these interactions on the performance of antifouling and antibiofilm coatings.

Main Methods:

  • Employed six ultrahigh molecular weight hydrophilic polymers with diverse chemistries and architectures.
  • Utilized three catecholamines and one polyphenol in codeposition experiments.
  • Investigated aqueous self-assembly into nanoaggregates, formation kinetics, steric stabilization, and surface deposition.

Main Results:

  • Polymer chemistry significantly influences the interaction strength between polycatecholamines and hydrophilic polymers.
  • This interaction affects aqueous self-assembly, nanoaggregate formation kinetics, steric stabilization, and surface deposition.
  • Both hydrophilic polymer chemistry and catecholamine type impact the antibiofilm properties of the developed coatings.

Conclusions:

  • Alterations in polycatecholamine-hydrophilic polymer interactions offer significant opportunities to refine surface coating processes.
  • Understanding these interactions is key to controlling polycatecholamine self-assembly and optimizing surface functionalities.
  • This work provides a foundation for designing advanced functional surfaces with tailored properties.